There's a difference in the graphics card (sometimes referred to asthe video card) that drives your OS display montitors, and a video capture/output device such as a Kona, Blackmagic, what have you.

The graphics card can only display 8 bit. The Kona et al is 10bit (or more) capable. The two are mutually exclusive. You cannot judge the quality on your computer display monitors, but rather you need to use the 10b display path that is available via your Blackmagic card. I looked up that NEC monitor, at first blush, it does appear to be 10b capable.

Rafael-

I dont understand what you are saying, there is no blur necessary. The generators in FCP7 are generators, meaning they will generate at whatever bit depth the timeline is set to and rendered. I don't know why you never believe me on these points. You seem to think FCP7 is stuck on 8b RGB when it's not. Some of it is (in RGB rendering, and RT previews) but most of it is not.

I dont know whats happening if you use FCPx which is what you seem to be doing. There is no video out of fcpx yet.

It's really really easy. Make a 10bit timeline, add the gradient generator, render. That's all you need for a 10bit gradient. Do you have a 10bit signal path Rafael? Meaning do you have a monitor that can display this properly?